Double-acting valve.



I T. A. CROMPTON, 3a..

DOUBLE ACTING VALVE. APPLICATION men MAY 10. 19:1.

Patented Sept; 18, 1917.

InosnZZr I 5. l'rom alo'razg CRoMPToN, Jr.,

. readily accessible.

THOMAS ALBERT CROMPTQN, JR., OF LONDPN, ENGLAND.

DOUBLE-ACTING VALVE.

Specification of lietters Patent.

Patented Sept. 18, 1917.

Application filed May 10, 1917- Serial No. 167,841.

To all whom it may concern:

Be it known that I, THOMAS ALBERT a subject of the King of England, residing in London, England, have invented certain new and useful Improve ments in Double-Acting Valves, of which the following is a specification.

This invention is for improvements in double-acting valves and has for its object to provide double-acting valves for use with containers of volatile substances, such as petrol, so that the valve may operate both as a vent to allow the escape of gas when the pressure in the container rises, and also to admit air when the pressure in the container is lowered, as for example when emptying the container. Various doubleacting valves have been proposed for this purpose and they are. used on tank steamers and the like, the valve being usually mounted at the end of a conduit which extends" down into the reservoir of the container. This conduit is sometimes connected with a second'conduit provided with a valve so that steam can beadmitted. through the second conduit for cleaning purposes and the valve at such times automatically closed to prevent the steam from escaping by the double-acting valve to which the present, invention applies. v

The object of the present invention is to provide a double-acting-valve for connection to such a conduit which may be readily accessible from outside, is well protected from damage, and has the adjustment means for the control of the valve so situated as to be In the accompanying drawing, which illustrates one method of carrying out this invention, the end of the conduit to be controlled by the double-acting valve is indicated by an externally screwthreaded portion A on which the whole of the valve-parts is mounted. Resting on the end of this part A, which for convenience will be referred to as the end of the conduit, i an annular valve-seat element B.- The val e-seat element has a seating face at B which receivesan annular valve (1. This valve has an ezgternal seatingrface C forcooperating to open outwardly, that isaway from the conduit, and an-internal seating face C which receives a second valve D'having an exterior seating face 1) for cooperation with the face 0 and to open inwardly. Both of these valves are of the mushroom type, the valve D hav-,

ing a perpendicular stem D which extends" outwardly from it and the valve C having i a central boss C which isguided onthe stem D The va1ve-seat element B has anouta wardly extending frame formed on that side which is away from the conduit, which frame comprises perpendicular arms B from the top of which extend inwardly in- 'cTiiied arms B carrying at their upper ends an internal screw-threaded socket B Screwed into the socket B E. The upper end of the stirrupis screwis a stirrup threaded at E to engage the socket B and v has at, its top a thumb-piece E by which 1t can be rotated. On the screw-threadedportion a lock-nut E is provided. The stirrup depends from the socket B and-the stem D of the valve D extends'through the foot or cr0ss-piece E of the stirrup and also"; i

through the thumb-piece E both of which,

parts are made to serve as guides for the stem D The stem D is screw-threaded at D and receives on this screw-threaded portion nuts D" D which are of such size as to lie between the limbs of the stirrup E.

against the outer side of the valve and at the other end against the underside of the foot E? of the stlrrup. A second com- A compression-spring F bears at one end pression-spring Gbears at its bottom against an internal flange 13 formed at the top of: the arms B and its upper end bears against a plate G which slides on the stem D of the valve D and on the limbs of the stirrup E; the plate Gr is thus thrust by the spring G against the nut D Inclosing the whole' of the valve-mecha-- nism is a conical hood H which is by arms H from a ring-nut H nut is internally screw-threaded the conduit member A and has an internal flange H which lies over the annular valvesup orted" The ringto engage seat element B, so that when the nut is screwed home, it can the end of the conduitn 1 Surrounding the valve-mechanisin is a gauze screen J, the lower end of whichis grip the latter. against 1651 secured .to a fastening-ringJ which-rests on the valve-seat element and alsolies under; the lip H? of the ring-nut H The top oi the screen is secured to a ring- J which bears against a shoulderi.; H* formed on the interior of the hood'H. From the above descijiption it will be seen that all the parts of the va1ve-rnechanism are carried by the annular valve-seat element B which seats on the end of the conduit A to which the valve is to be ap- C outward.

plied and thus all of the parts canbe instantly secured to, or removed from, the conduit by screwing the hood H into place or removing it therefrom. The flange H on the ring-nutiP, which forms an integral part of the hood H, grips the bottom of the screen J, and also the valve-seat element B, firmly when the ring is screwed home so that all the parts are held in position, but when the hood is removed, the screen J can be lifted ofl or without removing the screen the adjustment of the springs can be effected by means of the nuts D D or the thumb-piece E and nut E The operation of the valve is as follows When pressure is set up within the container, this tends to force both valves D and All that prevents these valves from moving outward is the one spring F and when the pressure in the container is suilicient to overcome this spring, the valves D and 0 rise bodily as a single valve, the

spring G offering no resistance to this movement. The compression of the spring F is adjusted by screwing the whole stirrup E up or down and when the proper compression has been arrived at, the position of the stirrup is fixed by means of the lock-nut E When the pressure in the container is lowered, as for example by change of temperature or by emptying the container, the valve C remains stationary but the valve I) opens inwardly agains theaction of its spring G. The compression of the spring G is adjusted by operating the nut D and when the proper position is found, this is locked by the nut 13*.

The gauze screen J is to prevent the contents of the container being set fire to, when these are inflammable, by the vapors escaping from the valve being ignited and then the flame being carried back through the valve. It will be seen that the gauze lies outside the valves so that no such backfiring can take place.

What I claim as my invention and desire to secure by Letters Patent is 2- 1. In a compound double-action valve, the combination or, a valve-seat element pro vided with means for connection to the end of a conduit, and having on that side which is to face away from the conduit a frame supporting a screw-threaded socket whose through axis is situated centrally relatively to the valve-seatiug, a stirrup having an ex ternal screw-threml whereby it is engaged With the aforesaid socket. the cross-piece of 'the stirrup lying at a point between the said ing face cooperating with the valve-seat te open outward and an internal sealing face and a throughway provided with a valve seating on that side which is toward the. conduit, a second lllliSlllOOlIl fttlVB mounted concentrically relatively to the first and bed ding on this second valve-seating to open inward, said valve having a stem which extends outward perpendicularly from it, passes through the cross-piece of the aforesaid stirrup as a guide and is screw-threaded at its upper end where it receives a nut, a con'ipression spring ope aiting between the bottom of the stirrup and the outwardly opening valve, :1 second compressi(in-spring thrust at one end against a support provided for it by the aforesaid socket carrying frame and controlled at the other end by the nut on the valve-stein, and means for locking the nut and the stirrup in any position in which each is set, substantiallyas set forth.

2. In a compound double-action valve, the

combination of, an annular valve-seatelement, an interruilly flanged and screwthreaded nut for connection to the exterior of the conduit, the valve-seat element having an exterior flange which can bed against the end of the conduit and he gripped between this and the internal flange of the said nut, the said element further having on that side which is to face away from the conduit a frame supporting a screw-threaded socket whose through axis is situated centrally relatively to the valveseatiug, a stirrup having an external. screwtlu'ead whereby it is engagcd with the aforesaid socket, the crosspiece of the stirrup ly' at a point between the said socket and the valve-seat, a valve of the mushroom type mounted concentrically in the 'alveseat and having an external sealing face cooperating with the valve-seat to open out rd and an internal sealing face and a throughway provided with a valveseatiug' on that side which is toward the passes through the cross-piece of the afore said stirrup as a guide and is screw-threaded at upper end wl'ure it receives a nut, a cmupres operating between the bottom of the run and the outwardly opening *ulve. a second compression spring thrust at one end against a support provided for it if the aforesaid socketcarrying frame and controlled at the other end by the nut o the val vestem, and means for locking the nut and the stirrup in any position in which each is substantialiyas set forth.

3, in a compound double-action valve, the combination of, a valve-seat. element provided with means for connection to the end of a conduit, and having on that side which is to face away from the conduit a frame supporting a screw-threaded socket whose through axis is situated centrally-relatively to the valve-seating, a stirrup having an external screw-thread whereby it is engagedtwith the aforesaid socket, the crosspiece of the stirrup lying at a point between the said socket and the valve-seat, a valve of the mushroom type mounted concentrically in the valve-seat and having an external sealing face cooperating with the valve-seat to open outward and an intehal sealing face and a throughway provided with a valveseating on thatside Which is toward the con-v duit, a second mushroom-valvemounted concentrically relatively to the first and bedding on this secondvalve seatingto open inward, said valve having a stem which extends outward perpendicularly from it, passes through the cross-piece of the aforesaid stirrup as a guide and is screw-threaded at its upper end where it receives a nut, a compression-spring operating-between the bot-.

tom of the stirrup and the outwardly opening valve, a second compressionspring thrust at one end against a support provided for it by the aforesaid socket-carrying frame and controlled at the other end by the nut on the valve-stem, means for locking the nut and the stirrup in any position in which each is set, and a domed hood secured over the whole valve'device, the base of the dome being larger in diameter than the valve-device and allowing free access of air to the interior, substantially as set forth.

4. In a compound double-action valve, the combination of, an annular valve-seat element, an internally ,flanged and screwthreaded nut for connection to the exterior of the conduit, the valve-seat element having an exterior flange which can bed against the end of the conduit and be gripped between this and the internal flange of the said nut, the said element further having on that side which is to face away from the conduit a frame supporting a screw-threaded socket whose through axis is situated centrally relatively to the valve-seating,a stirrup having an external. screw-thread wherebyit is engaged with the aforesaid socket, the crosspiece'of the stirrup lying at a point between the said socket and the valve-seat, a valve of the mushroom-typemounted concentrieally in the valve-seat and having an ex? ternal sealing 1 face cofiperatingwith the valve-seat to open outward and an internal sealing-face and a throughway provided with. a valve-seatingon that side which: is toward the conduit, a second mushroom I valve mounted concentrically relatively to the first and bedding on this second valveseating to open inward, said valve having a stem which extends outward perpendicularly "from it, passes throughflthe-cross-piece of 'sition in which each is the aforesaid stirrup asa. guide and is screwthreaded at its upper endwhere it'reoeives a nut, a, compression-spring operating'between the bottom ofthe stirrup, and the out-- wardly openingvalve, a second compressionspring thrust atone end-against'a support provided for it by the aforesaid socket-carrying frame and controlledatthe other end by the nut on the valve-stem, means for locking the 'nutand the skiz'rup in any pohood which covers the Whole valve-mechanism andis rigidly secured to the flanged nut whereby theannular valve-seat element is secured in place, the base of thehood ly ing'approxiinately at the same level as-this fastening'nut but being-of larger-diameter and a domed and open at the large end to allow-free acis to face away from the conduit a frame supporting a screw-threaded socket whose through axis is situated centrally .relativel y to the valve-seating, a stirrup having an ex ternal screw-thread whereby it is engaged with the aforesaid socket, the cross-piece of the stirrup lying at a point between the said socket and the valve-seat, a valve ofthe mushroom type mounted concentrically in thevalve-seat and having an external sealing-face cooperating with the valve-seat to open outward and an internal sealing-face land a through-way provided with a valveseating on that'side which is toward the conduit, a second mushroom-valve mounted concentrically relatively to the first and bedding on this second Valve-seating to open tends outward perpendicularly from it, passes through the cross-piece of the aforesaid stirrup and through the center of the:

threaded portion of the stirrup b'oth of whichparts are shaped to serve "as guides for the stem and is screw-threaded at a point which lies within the stirrupwhere it receives a nut, a compression-spring operating between the bottom of the stirrup and the outwardly-opening valve, a second compression spring thrust at one end against a support provided'for it byithe aforesaid socket-carrying frame and controlled at the other end by the nut on the valve-stem, and

means for locking the nut and "thestirrup in any position in which each is set, substan- I tially as set forth.

6; In a'compound doubleactionvalve,the combination of, a 'valve-seataelement provided with means 'for connection to the end of a conduit, and havingonthat side which is to face away from the" conduit a frame" supporting a screw-threaded socket whose through axis is situated'centrallyrelatively 105 inward, said valve having. a stern which exto the valve-seating, a stirrup having an external screw-thread whereby it is engaged with the aforesaid socket, the cross-piece of the stirrup lying at a point between the said socket and the valve-seat, a valve of the mushroom type mounted concentrically in the valve-seat and having an external sealing-face cooperating with the valveseat to open outward and an internal sealing face and athrouglnvay provided with a valvescating on that side which is toward the conduit, a second 1nushroo1n-valve mounted concentrically relatively to the first and bedding on this second valve-seating to open inward, said valve having a stern which extends outward perpendicularly from it, passes through the cross-piece of the afore said stirrup as a guide and is screw-threaded at its upper end where it receives a nut, a conipression-spring operating between the bottom of thestirrup and the outwardly opening valve, a second coiupression-spring thrust at one end against a support provided for itby the aforesaid sockct-cz'nrylng frame and controlled at the other end by the nut on the valve-stem, means for locking the nut and the s irrup in any position. in which each is set, a domed hood secured over the whole valve-device the base of the dome being larger in diameter than the valve-device and allowing free access of air to the interior, and a cylindrical gauze screen round the valve-mechanism engaged at its base with the valve-seat element and hearing at its upper end against the interior of the aforesaid domed hood, substantially as set forth,

7. In a compound double-action valve, the combination of, an annular valve-seat element. an internally flanged and screwtl'lreaded nut fort-onnection to the exterior of the conduit, the valv -seat element having" an. exterior flange which can bed against the end of the conduit and he gripped betneen this and the internal flange of the said nut, the said element further having on that side which is to face way from the conduit a frame supporting a sorewthfeaded socket whose through axis is situated centrally relatively to the valveseating, a stirrup havingan external screwthread whereby it is engaged with the aforesaid socket, the cross-piece of the stirrup lying at a point between the said socket and the valve-seat, a valve of the mushroom type mounted concentrically on the valve-seat and having an external sealing-face coopcrating with the valve scat to open outward and an internal sealing face and a through way provided with a valveseating on that side which is toward the conduit, a second n1ushrooni-valve mounted concentrically relatively to the first and bedding on this second valve-seating to open inward, said valve having a stem which extends outward. perpendicularly from it, passe'zs'through the crossnece of the aii'orcsaid stirrup as a guide and is screw-threaded at its upper end where it receives a nut, a compression-spring operating between the bottom of the stirrup and the outwz u'dly owning valve, a second compression-Spring thrust at one end against a. support providedfor it by the aforesaid soclmt-carrying frame and controlled at the other end by the nut on the valvostom, means for locking the nut and the stirrup in any position in which each is set, a domed hood which covers the whole valve-mechanisln and is rigidly secured to the flanged nut whereby the annular valve seat element is secured in place, the base of the hood lying approximately at the same level as this fastening-nut but being of larger diameter and open at the large end to allow free access of air, and a cylindrical gauze screen surrounding the valve-mechanismand having its lower end clamped be tween the flange of the fastening-nut and the valve-seat element which the nutsecures and upper end bearing against the interior of the domed hood, substantially as set forth, v 1

In testimony whereof I have signed my nameto this specification.

THOMAS ALBERT CltOlltlTtlll, James. 

